Hyundai Air Circuit Breaker

Applicable Machinery�HAT06, HAT08, HAT10, HAT12, HAT16, HAT20, HAT25,

HAT32, HAT40, HAT50

�HAS06, HAS08, HAS10, HAS12, HAS16, HAS20

Notice �Please read this instruction manual frist before using

Air Circuit Breaker.

�Contact the head office or branch office listed on the back if you have any inquiries or technical problems.

�Keep this instruction handy at all times.

�Changing to this instruction manual may be made withoutprevious notice due to quality improvement.

�Refer to our catalog for the rating items on our products.

2 << Air Circuit Breaker Instruction Manual

For Operational Safety of Air Circuit Breakers

Safety NoticesThank you for purchasing the HHI Air Circuit Breaker.

These safety notices contain important information on safety. Be sure to read these notices, the product instruction manual,

and other associated documents accompanying the product thoroughly to familiarize yourself with product handling, safety

information, and all other precautions before installing, operating, or inspecting the product.

The safety notices are divided into “DANGER”, “WARNING”, and “CAUTION” according to the hazard level:

� Installation work must be performed by competent persons.� Prior to commencing any installation work, open an upstream circuit breaker or the like to isolate

all sources of power/voltage. Otherwise, electric shock may result.

� Tighten terminal screws securely to the specified torque. Otherwise, a fire could result.

� Fix the ACB (draw-out cradle) firmly on a flat lever surface using mounting screws.Otherwise, draw-out operation may cause the ACB to fall.

� Avoid blocking the arc gas vents of the ACB to ensure adequate arc space (insulation distance). Blocking the vents could result in failure of ACB tripping.

� Do not place the ACB in such an area that is subject to high temperature, high humidity, dusty air, corrosive gas, strong vibration and shock, or other unusual conditions.Mounting in such areas could cause a fire, non-tripping, or malfunction.

� Be careful to prevent foreign objects (debris, concrete powder, iron powder, etc.) and rainwater from entering the ACB. These materials inside the ACB could cause a fire or non-tripping.

� For the ACB with four poles, connect the neutral wire of a 3-phase, 4-wire cable to the N-phase pole (on the right end). Otherwise, an overcurrent may cause non-tripping and a fire.

� Never touch live terminal parts. Otherwise, electric shock may result.

� Do not leave the ACB in the draw-out position. The ACB is heavy. Dropping the ACB could cause serious injury.

� If the ACB trips open automatically, remove the cause before closing the ACB.Otherwise, a fire could result.

� For the ACB with the fixed block, be sure to loosen the block screws before drawing out the ACB. Otherwise, damage to the ACB may result.

Operation Precautions

Installation Precautions

Transportation Precaution

A danger notice with this symbol indicates that neglecting the suggested procedure or practice could be fatal or

result in serious personal injury.

A warning notice with this symbol indicates that neglecting the suggested procedure or practice could result in

serious personal injury and/or property damage.

Note that failing to observe caution notices could result in moderate or slight injury/damage in some situations.

Because safety notices contain important information, be sure to read and observe them.

Never enter the area under the ACB when it is lifted or suspended using a lifter or chain block in case the ACB drops accidentally. The ACB is heavy. Entering such an area could cause serious injury.

HAT Series ACB Instruction Manual >> 3

ACB | Instruction Manual

Maintenance and Inspection Precautions

� ACB maintenance, inspection and/or parts replacement must be performed by competent persons.� Prior to commencing any work on the ACB, open an upstream breaker or the like to isolate all sources of power/

voltage from both the primary and auxiliary circuits.Otherwise, electric shock may result.

� Prior to commencing ACB internal inspection, make sure that the ACB is open and the closing spring is released. Otherwise, fingers or tools could be pinched in the internal mechanism, causing an injury.

� Retighten the terminal screws periodically to the specified torque. Otherwise, a fire could result.

� Retighten the arcing contact mounting screws periodically to the specified torque.Otherwise, a fire or malfunction could result.

� Be sure to reinstall the arc chute if removed. Failure to do so or incorrect installation of the arc chute may result in a fire and burns.

� Do not touch ACB live parts (contacts in particular), or structural parts close to a live part immediately after opening the ACB to stop supplying power. Otherwise, remaining heat may cause burns.

� Do not bring your hand or face close to the arc gas vent of the arc chute while the ACB is closed. Otherwise, a burn may result from high-temperature arc gas blowing out of the arc gas vent when the ACB trips open.

6. Over-Current Protective Device 27

6.1 Base Current (I0) of Type AOR Multifunction Protective Device

6.2 Protective Functions and Setting Ranges of Type AOR

Multifunction Protective Device

6.3 Operation Indication Functions of Type AOR Multifunction

Protective Device

6.4 Field Test Method of Type AOR Multifunction Protective Device

7. Insulation Resistance Test and Dielectric Withstand Test 46

7.1 Main Circuit

7.2 Control Circuit (to Earth)

8. Troubleshooting Points 47

9. Draw-Out Mechanism of HAS Type 48

9.1 Moving the Breaker Body Within Draw-Out Cradle

9.2 Putting the Breaker Body Back Into Draw-Out Cradle

10. Circuit Diagrams of AOR 50

11. Circuit Diagrams of HAT 52

12. Appendix 56

12.1 Ground Fault Protection

12.2 Closing and Tripping Operation Cycles

1. Receiving and Handling 4

1.1 Storage

1.2 Directions for Transportation

2. Description of Various Parts 4

3. Operation 6

3.1 Manual Charging Type

3.2 Motor Charging Type

3.3 Slow Closing Operation

4. Draw-Out Mechanism 9

4.1 Moving the Breaker Body Within Draw-Out Cradle

4.2 Drawing Out the Breaker

4.3 Putting the Breaker Body Back Into Draw-Out Cradle

5. Periodic Inspection and Parts Replacement 15

5.1 Arc Chutes

5.2 Contacts

5.3 Operating Mechanism

5.4 Internal Accessories

� OCR field tests must be performed by competent persons.� Never touch live terminal parts.

Otherwise, electric shock may result.

OCR Field Tests Precautions

Contents

Description of Various Parts

Upon receipt of your breaker, check the following.

If you have any questions or any problems, contact our agent nearest you.

HAT series Air Circuit Breakers are completely assembled, inspected and tested both electrically and mechanically

at the factory, then shipped in fully guaranteed condition in construction and operation.

1.1 StorageWhile it is recommended that the breaker be used as soon as you receive it, if it is necessary to store the breaker

for some time before its installation, please note the following for proper storage:

1) Store the breaker in a dry indoor location to prevent condensation due to sudden change in temperature,

which is quite harmful to the breaker insulation.

2) Store the breaker in a clean place free of corrosive gases, dirt and dust. In particular, a mixture of cement

dust and moisture can cause corrosion in the various metal parts of the breaker, so fully protect the breaker

from such mixtures.

3) Place the breaker on a flat, level surface in its normal position.

4) Do not place the breaker directly on the floor.

1.2 Directions for TransportationWhen transporting the breaker from one place to another, note the following:

1) When lifting the breaker, apply wire ropes to the lifting plates (Fig. 1. ⑦).

Take necessary care so that the tightened wire ropes may not touch the arc chutes (Fig. 1. �) and

multi-protective device (Fig. 1. �).

When lifting the breaker, be sure to lift it up slowly.

2) Lower the breaker onto a flat, level surface.

3) Avoid impacts and shocks to the breaker during transportation.


Receiving and Handling 01

02

� Fig. 1. General view of HAT06~HAT40 type � Fig. 1-1. General view of HAT50 type

Draw-out cradleBreaker bodyName plateCharging handleMechanism coverDraw-out handle (for HAT06~HAT40)Lifting lugs used to transport the breaker and install the breaker into the switchgearPosition indicatorOpen-close indicatorSpring charge indicatorPush to close button: Pressing this button closes the breakerPush to open button: Pressing this button opens the breakerPosition stopper release lever (HAT06~HAT40) When this lever is in the up position, the breaker is locked in each of the �CONN�, �TEST�and �ISOLATED�positions This lever can be turned down only when the breaker is �OPEN�Turning down this lever unlocks the position stopper and opens the shutter which covers draw-out handle insert holePosition padlock lever (HAT06~HAT40) Up to three padlocks may be applied to this lever to keep the breaker body locked in the �CONN�, �TEST�or �ISOLATED�position Padlocks themselves are not supplied (6 to 8 shackle diameter)Draw-out handle insertion holeDraw-out stopper (ref. pages 13, 1-3 and 1-4 [for HAT50])Wiring hole for position switchAuxiliary switch assembly. The auxiliary switch assembly has five a-contacts and five b-contacts and wiring is made to the switch terminalsM3.5-㎜ terminal screws are to be used (HAT50 type has three a-contacts and four b-contacts)Disconnect device for control circuitsOpen padlock lever (optional) The breaker may be padlocked in the �OPEN�position To padlock the breaker in the �OPEN�position, press the �PUSH TO OPEN�button ⑫ and pull out the lever �, then apply up to three padlocks to the lever Under this padlocked condition, the breaker is prevented from being closed manually or electrically To return the lever � to the withdrawn position, un-padlock and press the �PUSH TO OPEN�button ⑫ again Padlocks themselves are not supplied (6 to 8-㎜ shackle diameter)Front coverDust plate (optional)OCR front coverArc chuteFront cover mounting screwFixing blocks (optional); These blocks are standard equipment when the breaker is subject to the ship classification society’s rules These are to be secured to the switchboard framework The breaker body ② is secured to the draw-out cradle ① by the screws only when it is in the �CONN�positionType AOR multifunction protective device (optional)Under-voltage trip device (optional)Close-open counterKey-lock (optional)Release lever (for HAT50)Draw-out handle fixing clip (for HAT50)Extention rail (for HAT50) To fully draw-out the breaker body from draw-out cradle, this rail is subject to draw-out rail Breaker stopper (for HAT50)Draw-out rail (for HAT50)Button for draw-out (for HAT50)

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Operation03

HAT series air circuit breakers are available either in manual charging type or in motor charging type.

3.1 Manual Charging TypeIn the manual charging type, charging the closing springs and open-close control of the breaker are all done manually.

The breaker is able to close only when the closing springs are charged.

1) Spring charging operation.

Follow the procedure given below to charge the closing springs.

�Pump the charging handle. The maximum stroke of the charging handle is about a 105�angle.

�When the closing springs are fully charged, a metallic “CLICK” will be heard and no further pumping of the

charging handle will be possible. When the charging handle is pumped with its maximum stroke at approx.

105�, about four pumping cycles will complete the charging.

Check that the spring charged indicator (Fig. 4. ⑩) now shows “CHARGED”.

2) Closing operation.

Before closing the breaker, check the following items:

�The closing springs should be charged.

�The position stopper release lever (Fig. 4. ⑬) should be in the up position.

�The shutter of the draw-out handle insertion hole (Fig. 4. ⑮) should be completely closed.

�The open position padlock lever (Fig. 4. �) should not be pulled out.

�The specified voltage should be applied to the under-voltage trip device option or the function

of the under-voltage trip device should be locked.

See the description of the under-voltage trip device for the procedure in detail.

Upon satisfactory confirmation of the above items, open manual operation button cover upward,

if provided, and press the PUSH TO CLOSE button (Fig. 4. ⑪). The breaker is closed.

The OPEN-CLOSED indicator (Fig. 4. ⑨) shows “CLOSED”, and the spring charged indicator (Fig. 4. ⑩)

shows “DISCHARGED”.

Do not force down the charging handle after completion of charging.Doing so may cause a malfunction.

Charging handlePosition indicatorOpen-closed indicatorSpring charged indicatorPush to close buttonPush to open buttonPosition stopper release leverDraw-out handle insertion holeOpen position padlock leverFront protective cover

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� Fig. 4. Front view

3) Opening operation.

Open the manual operation button cover upward if provided and press the PUSH TO OPEN button (Fig. 4. ⑫).

This trips the breaker, and the OPEN-CLOSED indicator (Fig. 4. ⑨) shows “OPEN”.

3.2 Motor Charging TypeIn this type, a motor-operated mechanism automatically charges the closing springs.

Means for remote electrical OPEN-CLOSED control of the breaker are also fitted.

See page 52 for control circuit diagram. Complete manual operations are also possible for the same procedures as

described in above manual charging type section.

1) Spring charging operation.

� Supply the specified control power voltage to the charging motor circuit.

� In case of AC motor, check whether the UVT is applied to specified voltage or locking function [See clause 5.4, 2)].

� As soon as the closing springs are discharged, the charging motor is turned on to charge the closing springs.

� The charging motor is automatically stopped when the closing springs are fully charged, and the spring

charged indicator (Fig. 4. ⑩) shows “CHARGED”.

While the charging time varies depending on the rated control voltage and the type of breaker,

it is normally within a range from 2.4 to 10 seconds.

2) Closing operation.

Before closing the breaker, check the following items:

� The closing springs are charged.

� The position stopper release lever (Fig. 4. ⑬) is in the upper position.

� The shutter of the draw-out handle insertion hole (Fig. 4. ⑮) is completely closed.

� The open position padlock lever (Fig. 4. �) is not pulled out.

� The specified voltage is applied to the under-voltage trip device (optional) or the function of the under-voltage

trip device is locked (see the description of the under-voltage trip device for the procedure described in page 21).

Upon satisfactory confirmation of the above items, press the CLOSE button (PB “CLOSE”, see page 52).

This energizes the latch release coil (LRC, see page 52), which, in turn, releases the charged closing springs and the

breaker is immediately closed.

The spring charged indicator shows “DISCHARGED”.

With the closing springs discharged, the charging motor is immediately turned to charge the closing springs.

3) Opening operation.

The shunt trip device (SHT) or under-voltage trip device (UVT) is used for remote electrical opening operation.

Press the OPEN button (PB “OPEN”, see page 52).

This trips open the breaker via the SHT or UVT.

The permissible control voltage range for the charging motor is 85 to 110% of the rated voltage when AC rated, or 75 to110% when DC rated. It is strongly recommended to supply the control power at the rated voltage.

When dielectric withstand voltage test is carried out, the dielectric withstand voltage of DC 100 V, AC 100 V, and AC 220 Vmotors is 1500 V, but for DC 24 V, and DC 48 V motors it is 500 V.

Even when items (2) to (5) are not satisfied, the charged closing springs are released by pressing the PUSH TO CLOSEbutton, but the breaker will not be placed in closed state. Be sure to perform closing operation according to each item, (2) to (5).

When open-close operations are repeated with the charging motor ON, limit the number of successive open-close cycles to 15. If the OPEN-CLOSE cycle is repeated more than 15 times, allow a cooling period of at least 20 minutes between the15th cycle and the 16th cycle.



Operation03

3.3 Slow Closing OperationAvoid slow closing operation for purposes other than inspection and maintenance of the breaker.

Check that 3-poles of arcing contact are touched at the same time or the main contact is touched after the

arcing contact has touched, using an optional slow-close operation jig pair (2 jigs/set).

1) Remove the breaker body (Fig. 1. ②) from the draw-out cradle.

See the next draw-out mechanism section for how to remove the breaker body.

2) Place the removed breaker body on a workbench in such a position that its bottom is readily visible and accessible,

turning it sideways or backwards.

Take every precaution to avoid damage to the breaker.

3) Pump the charging handle (Fig. 4. ④) to fully charge the closing springs and loosen the wing screws (Fig. 6. ).

4) When the springs are fully charged, a wider gap (marked ※ in Fig. 6) develops between each closing spring guide

(Fig. 6. ) and the closing spring guide shaft.

Insert the jig’s leaf springs into each gap (square hole), with their pins toward the outer side of the breaker.

Make sure that these jigs should be fitted to both the closing spring guides.

5) Check that the conditions to close the breaker are satisfied.

See items [3-1, 2)], closing operation of page 6.

6) Press the PUSH TO CLOSE button (Fig. 4. ⑪).

Although the closing mechanism moves slightly, the breaker remains open.

The breaker is now ready for slow closing operation.

7) Pump the charging handle (Fig. 4. ④).

The moving contacts move toward the stationary contacts in unison with down strokes of the charging handle,

and the breaker is closed with 3 or 4 pumping cycles.

When the breaker is closed, the indicators show “CLOSED” and “DISCHARGED”, respectively.

8) Restoring the slow-close condition to normal.

�Press the PUSH TO OPEN button (Fig. 4. ⑫) to open the breaker.

�Pump the charging handle (Fig. 4. ④) to charge the closing springs.

The spring charged indicator (Fig. 4. ⑩) shows “CHARGED”.

To irritate the SLOW CLOSING OPERATION execute from 6) to 7) again.

�Compress the jig’s leaf springs to remove the jigs from the respective closing spring guides (Fig. 6. ).

The jigs cannot be removed after the PUSH TO CLOSE button is pressed, in this case repeat the procedure from 6).

Attach the jigs to frame base.

※ Only operate ACB in normal state after removing slow closing jigs.

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� Fig. 6. Bottom side view of ACB

Slow-close operation jigFrame baseClosing spring guideWing screw

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� Operational Precautions

Draw-Out Mechanism04

The draw-out mechanism permits one to draw out and remove the breaker body from the draw-out cradle and

to put the breaker body back into the cradle, which facilitate the inspection and parts replacement.

The draw-out mechanism permits one to move the breaker body to any of the following three positions in the

draw-out cradle.

The switchboard panel door can be shut with the breaker body drawn out to the TEST or ISOLATED position.

The auxiliary switch assembly (Fig. 1. �) mounted on the draw-out cradle works in the CONN. and TEST positions

(only the CONN. position when the breaker is subject to ship classification society rules).

In this position, the main circuit and the control circuits (of the breaker) are connected to the

external circuits for normal service.

In this position, the main circuit is isolated, but the control circuits are connected.

This position permits such tests as CLOSE-OPEN test, control circuit function test, etc.

In this position, the main circuit and the control circuits are isolated.

The breaker is completely de-energized in this position.

Conn. position

Test position

Isolated position

� When a metallic click sound is heard (the draw-out mechanism shaft is locked), stop turning the draw-out handle. Otherwise, a malfunction may result.

� Make sure the shutter (Fig. 4. ⑮) is closed after the draw-out handle is removed.A halfway position of the breaker body may cause the breaker to fail in closing operation.

� Open the breaker before working with the draw-out mechanism.� Be sure to loosen the screws of the fixing blocks (Fig. 1. �) before drawing out the breaker body.

Otherwise, a malfunction may result.� Do not work with the draw-out mechanism while holding the position stopper release lever (Fig. 4. ⑬).

Doing so may cause a malfunction.� When you try to move the breaker body to the CONN. position, the operating force will increase.

Further rotate the draw-out handle 2 or 2.5 turns to move the breaker body to the CONN. position.



� Conn. position � Test position � Isolated position

� Typical operating force

HAT06~HAT20 HAT25 HAT32~HAT40

10 kgf 12 kgf 25 kgf


4.1 Moving the Breaker Body Within Draw-Out Cradle The draw-out handle (installed external to the breaker Fig. 1. ⑥) is used to move the breaker body to one of the three

positions (CONN., TEST, and ISOLATED) in the draw-out cradle.

1) Moving to test position.

�When the fixing blocks (Fig. 1. �)are fitted, loosen and free the right and left screws.

�Check that the breaker is OPEN.

If it is CLOSED, press the PUSH TO OPEN button (Fig. 7. ⑪) to open the breaker.

�Turn down the position stopper release lever (Fig. 7. ⑬) to open the shutter of the draw-out handle

insertion hole (Fig. 7. ⑮).

� Engage the draw-out handle with the draw-out mechanism shaft (Fig. 7. ) and turn the handle counterclockwise

to move the breaker body.

As the breaker body is drawn out, the position stopper release lever (Fig. 7. ⑬) automatically returns to the up

position, but leave it as it is.

When the main circuit is disconnected as the breaker body is being drawn out, the breaker body will be slightly

pushed forward by the spring action of the primary disconnect contacts with a “banging” sound.

While the loudness of this sound may vary from one breaker type to another, the sound itself is perfectly normal

and does not affect the breaker performance.

2) Moving to isolated position.

When the fixing blocks (Fig. 1. �) (optional) are fitted, be sure to loosen the right and left screws of the fixing blocks before drawing out the breaker body.Otherwise, a malfunction may result.

When the draw-out handle is inserted in the draw-out mechanism shaft, the breaker is prevented from being closed. For close-open test, remove the draw-out handle.

If the automatic closing spring release mechanism (optional) is fitted, the charged closing spring will be automaticallydischarged as the breaker body is moved from the TEST position to the ISOLATED position. Although this may be felt as a light shock, just continue the draw-out operation.

When the breaker is drawn out to the TEST position, a metallic click will be heard, the breaker will be locked in this position, and further turning effort on the draw-out handle will be stopped.The position indicator (Fig. 7. ⑦) now shows “TEST”.Do not attempt to compulsively the draw-out handle while it is locked.

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� After the breaker body has been drawn out to the test position, turn down the position stopper release lever

(Fig. 7. ⑬) again.


� Fig. 7

Draw-out handlePosition indicatorOpen-closed indicatorPush to open buttonPosition stopper release leverPosition padlock leverDraw-out handle insertion holeDraw-out mechanism shaft

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4.2 Drawing Out the Breaker (for HAT50) To move the breaker from the “CONNECTED” to “TEST” or “DISCONNECTED” position, the draw-out handle (Fig. 10-1. ⑥)

must be used. The draw-out handle is secured to the righthand side of the draw-out framework by the wing screw

(Fig. 10-1. ). Loosen the wing screw (Fig. 10-1. ) to remove it from the framework.

1) Drawing out from “CONNECTED” to “TEST” position.

� Loosen and free the right and left fixing screws (Fig. 10-1. ) with draw-out handle, but do not remove them

completely.

� Push the right and left release levers (Fig. 10-1. ) down.

� Pressing the “Button for Draw-Out” (Fig. 1-1. ), open the shutter which is covering the draw-out handle

insertion hole (Fig. 1-1. ⑮) and engage the draw-out handle (Fig. 10-1. ⑥) with the draw-out operation shaft by

inserting the handle (Fig. 10-1. ⑥) through the insertion hole (Fig. 1-1. ⑮).

� Turn the draw-out handle (Fig. 10-1. ⑥) counterclockwise; the breaker slides out.

When the breaker body slides out to the “TEST” position, the draw-out position stoppers operate and lock the

breaker body in TEST position. If locked, do not turn the draw-out handle (Fig. 10-1. ⑥) any further.

� When opening and closing test, etc. are made at this position, be sure to remove the draw-out handle (Fig. 10-1. ⑥).

2) Drawing out to “DISCONNECTED” position.

� After drawing out the breaker body to the “TEST” position, push up the release levers (Fig. 10-1. ).

� Turn the draw-out handle (Fig. 10-1. ⑥) further counterclockwise; the breaker body slides out to the

“DISCONNECTED” position and the draw-out position stoppers operate again to lock the breaker body

in DISCONNECTED position. If locked, do not turn the draw-out handle (Fig. 10-1. ⑥) any further.

� Remove the draw-out handle.

� Turn the draw-out handle counterclockwise to move the breaker body.

As the breaker body is drawn out, the position stopper release lever (Fig. 7. ⑬) automatically returns to the

up position, but leave it as it is.

When the breaker is drawn out to the ISOLATED position, a metallic click will be heard, the breaker will be locked in this position, and further turning effort on the draw-out handle will be stopped. The position indicator (Fig. 7. ⑦) now shows “ISOLATED”. Do not attempt to forcefully turn the draw-out handle under this condition, but remove it.

Never enter under the breaker.The breaker weight will cause serious injuries in the event that it drops.

Do not attempt to force-turn the draw-out handle while it is locked.When the draw-out handle is inserted in the draw-out mechanism shaft, the breaker is prevented from being closed. For close-open test, remove the draw-out handle.

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3) Further withdrawal and removal of breaker body from ISOLATED position.

The breaker body may be further drawn out from the ISOLATED position to remove it from the draw-out cradle

for inspection, maintenance or parts replacement purposes.

If the breaker is in charged condition, perform close-open operation once and release the closing spring.

� Lower the left and right draw-out stoppers to unlock the breaker body and slowly draw out the breaker body

from the draw-out cradle until the draw-out stoppers are locked.

� Apply wire ropes to the lifting plate (Fig.1. ⑦) and lift the breaker body upward after unlocking the left and

right draw-out stoppers.

Alternatively, a lifter (available as option) may be used to remove the breaker body from the draw-out cradle.

Do not leave the breaker body as it is. When the above operation is made in as-received condition to separate the breaker body from the cradle, take necessary measures to prevent the possible turnover due to a change of the center of gravity.


3) Drawing out from “DISCONNECTED” position to out of the draw-out framework, the breaker body can be

further drawn-out by using the extension rails (Fig. 1-1. ) for making inspection, maintenance, or parts

replacement or for removing the breaker body from the framework.

� Draw out the breaker body to the “DISCONNECTED” position with the draw-out handle (Fig. 10-1. ⑥), then remove

the draw-out handle (Fig. 10-1. ⑥).

� Insert the extension rails (Fig. 1-1. ) into the end sockets of the right-and left-hand draw-out (Fig. 1-1. ),

respectively.

� Push down the release levers (Fig. 10-1. ), then pull the breaker body forward by holding the breaker body fixing

pieces (Fig. 10-1. �) by hands until the breaker body is stopped by the extension-rail end stoppers.

The draw-out position stoppers will operate at halfway between the “DISCONNECTED” position and fully drawn-out

position which will lock the breaker body again.

In this case, unlock by pushing up the release levers (Fig. 10-1. ) and pull out again.

※ How to take out breaker body from framework.

After drawing out the breaker body to the fully drawn out position, lift the breaker body off the rails with a chain-

block or the like, using the lifting holes (Fig. 1-1. ⑦) of the breaker body.

4.3 Putting the Breaker Body Back into Draw-Out Cradle

1) Follow the procedure given below to put the removed breaker body back into the draw-out cradle

(for HAT06~HAT40).

� Check that the breaker is OPEN, then check that the position indicator (Fig. 1. ⑦) is showing “ISOLATED”.

� Check that the jigs for slow-closing operation (Fig. 6. �) is secured in the frame base (Fig. 6. ).

� Check that the spring charged indicator (Fig. 1. ⑩) is showing “DISCHARGED”, indicating that the closing springs

are discharged.

※ If automatic closing spring release mechanism (optional) is fitted, the charged closing springs will be automatically

discharged as the breaker body is moved from the ISOLATED position to the TEST position.

Although this may be felt as a light shock, just continue the insertion operation.

� Lift up the breaker body or use a special lifter.

Push in the breaker body until the draw-out stoppers are locked so that the slide plate of the breaker body side will

be engaged with the slide plate of the draw-out cradle side.

Never enter under the breaker.The breaker weight will cause serious injuries in the event that it drops.

If it is desired to secure the breaker body in the TEST or DISCONNECTED position, loosen the position fix screw (Fig. 10-1. ), slide out the breaker fixing plate (Fig. 10-1. ), tighten the breaker fixing screw (Fig. 10-1. ), and position fix screw (Fig. 10-1. ). Repeat these steps on the other side. The breaker fixing plates (Fig. 10-1. ) should be pushed back and secured in place when not used.

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� Fig. 8

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� Turn the draw-out handle clockwise to send the breaker body into the draw-out cradle.

As the breaker body is moved the position stopper release lever (Fig. 10. ⑬) automatically returns to the up

position, a metallic click will be heard, the breaker will be locked in its position, and further turning effort on the

draw-out handle will be stopped.

The position indicator (Fig. 10. ⑦) now shows “TEST”.

Turn down the position stopper release lever again, and turn the draw-out handle clockwise to send the breaker

into the CONN. position.

The position stopper release lever automatically returns to the original position (up position), but continue the

insertion operation.

Mating of the primary disconnect device starts just before the CONN. position, and the draw-out handle will

become heavy, but continue to turn the handle.

When the breaker is sent into the CONN. position, a metallic click will be heard, the breaker will be locked in this

position, and further turning effort on the draw-out handle will be stopped.

The position indicator now shows “CONN.”.

Remove the draw-out handle (Fig. 10. ⑥).

� Further push in the breaker body again until the draw-out stopper is locked.

This position is “ISOLATED”.

� Turn down the position stopper release lever (Fig. 10. ⑬) to open the shutter of the draw-out handle insertion hole

(Fig. 10. ⑮), and engage the draw-out handle with the draw-out mechanism shaft (Fig. 10. ).

Draw-out handlePosition indicatorOpen-closed indicatorPush to open buttonPosition stopper release leverPosition padlock leverDraw-out handle insertion holeDraw-out mechanism shaft

When you try to move the breaker body to the CONN. position, the draw-out handle operating force will increase. This is because the primacy circuit contacts in the breaker begin to close and the insertion friction increases; An increase in handle operating force is not a sign of failure. Further rotate the draw-out handle 2 or 2.5 turns to move the breaker body to the CONN. position.

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� Fig. 9

� Fig. 10


3) Frequency of periodic inspection.

�It is most appropriate that the user works out his or her own inspection plan for the breakers according to the

switching frequency, the values of normal making and breaking of currents, the magnitude of fault current

interrupted, service conditions and environmental conditions, otherwise it is recommended to perform a simplified

inspection once every 6 months and a full inspection once a year.

Be sure to draw out the breaker to the ISOLATED position or to remove the breaker body from the draw-out cradle

for inspection or parts replacement purposes.

2) Putting the removed breaker body back into the draw-out framework, observe the following procedure

(for HAT50):

� Insert the extension rails (Fig. 1-1. ) into the end sockets of the draw-out rails (Fig. 1-1. ) and place the breaker

body on them.

� Push up the release levers (Fig. 1-1. ) and push breaker body into the draw-out framework manually; the draw-

out position stoppers will operate and lock the breaker body in the “DISCONNECTED” position.

Remove the extension rails (Fig. 1-1. ).

� Push the release levers (Fig. 1-1. ) down, then press the “Draw-Out” button (Fig. 1-1. ), open the shutter which

is covering the draw-out handle insertion hole (Fig. 1-1. ⑮), and engage the draw-out handle (Fig. 10-1. ) with the

draw-out operation shaft.

� Turn the draw-out handle (Fig. 10-1. ⑥) clockwise.

The draw-out position stoppers will operate again when the breaker body reaches the “TEST” position; push up the

release levers (Fig. 1-1. ) and turn the draw-out handle (Fig. 10-1. ⑥) further clockwise.

The draw-out position stoppers will operate once again.

This is the “CONNECTED” position.

� Remove the draw-out handle (Fig. 10-1. ⑥) and tighten the right and left fixing screws (Fig. 10-1. ) firmly.

The breaker is now ready for operation.

� Put the extension rails (Fig. 1-1. ) and draw-out handle (Fig. 10-1. ⑥) back to original place and fix in place by

tightening the wing screws.

Failing to firmly tighten these screws may cause a breaker malfunction in particular when the breaker is installed in such an area that is subject to strong vibration.

A click sound, a measure to check if an intended breaker position is reached, may be inaudible depending on the ambientconditions. In such a case, rely on a change in draw-out handle operating force in order to check if the intended breakerposition is reached. When the handle is locked and impossible to turn anyway, the breaker has reached the intended position. Do not forcefully the draw-out handle while it is locked. Doing so may cause a malfunction.

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� When the fixing blocks (Fig. 1. �) are fitted, fully tighten the right and left fixing screws using the draw-out handle.

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� Fig. 10-1

Draw-out handleFixing blockRelease leverDraw-out handle fixing clipExtension rail StopperDraw-out railPosition indication markFixing boltFixing boltFixing plate

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4) Mechanical durability of the breaker.

�The following table shows the mechanical durability of the breaker in terms of the number of switching cycles.

When the breaker switching cycles exceed those shown in the table, the possibility of failure may increase.

For renewal or thorough inspection of the breaker, contact HHI.

5) Frequency of periodic inspection.

�While it is most appropriate that the user works out his or her own inspection plan for the breakers according to the

switching frequency, the values of normal making and breaking of currents, the magnitude of fault current

interrupted, service conditions and environmental conditions, it is recommended to perform a simplified inspection

once every 6 months and a full inspection once a year.

5.1 Arc Chutes Check each arc chute during the periodic inspection and also after a fault current is interrupted.

A cracked arc chute cover or deionized grid side plate, or heavy, hard-to-remove molten contact or deionized grid

pieces inside the arc chute require replacement of the arc chute.

1) Periodic inspection.

Frame size 2500 A or smaller 3200 A or larger

No. of switching cycles 10,000 5,000

Inspection interval based on switching cycles

Switching conditions of ACB Below 630 1250 frame (A) Over 3200

frame (A) 2500 frame (A) frame (A)

Switching operation in the state of nearly 1,000 1,000 1,000

no-carrying current

Switching operation in the rated current region 1,000 500 100

Switching operation in overload region 25 25 10

(about 6 times the rated current)

Switching operation in current interruption region Each time Each time Each time

Be sure to draw out the breaker to the ISOLATED position or to remove the breaker body from the draw-out cradle for inspection or parts replacement purposes.Make sure that live parts have cooled down before performing inspection work.

Inspection item Method / Criteria

Check visually.

Dirt, dust, foreign matter Inside must be clean, free of foreign matter and dust.

Blow off foreign matter and dust with a jet of compressed air.

Check visually.

Cracks There should be no cracks or other damage.

Replace arc chute if cracked or damaged.



Periodic Inspection and Parts Replacement05

5.2 ContactsThe pole contact assemblies are visible and accessible when the arc chutes are removed.

Check them during a periodic inspection and after a short-circuit fault current is interrupted.

2) Removal and mounting.

Loosen the two mounting screws captivated on an arc chute until they are free, then remove the arc chute.

To mount the arc chute, set it in position and tighten the two mounting screws.



� Fig. 11. Arc chute

� Fig. 12. Sideview of contact assembly

Stationary arcing contactStationary main contactMolded baseContact bearingRibbon LeadContact holderContact springContact tipOperating rodLock nutAdjusting screwMoving contact pinMain moving contactMoving arcing contactStationary arcing contact mounting screwMoving arcing contact mounting nut

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1) Periodic inspection.

(1) Arcing contacts.


� Check visually.

� Blackening of contact tip surfaces is due to oxidation and sub-formation, but is not a problem

since it is wiped off during the closing operation.

Contact tip surfaces � Remove dirt, dust, grease, etc.

� Dress roughened surfaces with fine emery paper (#200).

If thickness of contacttip is reduced to ⅓ of original value after a number of dressing operations,

replace both the moving and stationary arcing contacts.

� Check each moving arcing contact for loosening of mounting nut (M5) (Fig. 12. �).

Mounting conditions � Tighten screws as necessary.

� Check each contact tip pair for proper alignment in the closed position.

(2) Main contacts.

If the main contacts are toughened through wear, clean their surfaces during periodic inspection.

2) Replacement.

(1) Stationary arcing contact (see Fig. 12. ①).

‐ Remove the two mounting screws (Fig. 12. ⑮) and remove the stationary arcing contact (Fig. 12. ①).

‐ Set a new stationary arcing contact in position and firmly tighten the two mounting screws.

When dressing contact tips, be careful to not let dust fall into the breaker mechanism.After dressing, be sure to wipe and clean the tips.



� Fig. 13. Stationary arcing contact

5.3 Operating Mechanism

‐ Remove the mounting nut (Fig. 12. �) and remove the moving arcing contact (Fig. 12. ⑭).

Take extra care so as not to drop the spring washer.

‐ Set a new moving arcing contact in position and firmly tighten the mounting nut.

Breaker type No. of moving arcing contacts per pole

HAT/HAS 06, 08 Two pieces (with left and right side pieces paired)

HAT/HAS 10, 12 Two pieces (with left and right side pieces paired)

HAT/HAS 16 Two pieces (with left and right side pieces paired)

HAT/HAS 20 Two pieces (with left and right side pieces paired)

HAT 25 Two pieces (with left and right side pieces paired)

HAT 32 Two pieces (with left and right side pieces paired)

HAT 40 Three pieces (with left, center and right side pieces paired)

HAT 50 Three pieces (center piece paired)

(2) Moving arcing contact (see Fig. 14).



� Fig. 14. Moving arcing contact

� Fig. 15

Stationary contact assembly Moving contact unit Operation rod Connector lever Crossbar Closing spring Closing link Tripping link Trip lever A Trip lever B Trip lever pin Closing roller Trigger lever Trigger lever Trigger link Trigger actuating lever Trigger actuating lever shaft Closing cam Closing camshaft Closing latch Closing release lever Closing release pawl Closing release plate Closing springs Ribbon lead

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1) Periodic maintenance.

Check the operating mechanism in detail as much as possible.

If there are detail parts that seem to require a check but are hard to check, please contact HHI.

Inspection item Method / Criteria / Disposition

Operation � Open and close the breaker through manual control to check the mechanical

parts for normal operation.

Lubrication � Add a small amount of grease to each of the pins, shafts and their bearings.

Avoid excessive oiling as such will result in accumulation of dirt and dust.

Screws, bolts and springs � Check tightening screws and bolts of each part for loosening.

Tighten them if loose.

� Check each spring for proper engagement and damage.

Correct problem by repair or replacement. Dirt and dust

Dirt and dust � Latching parts should be free of dirt and dust.

Wipe them with a clean cloth.

5.4 Internal AccessoriesRemove the front cover (Fig. 1. �) to gain access to the internal accessories.

Also remove the OCR front cover (Fig. 1. �) and the mechanical part protective cover (Fig. 16. ⑩) if necessary.

To remove the front cover, remove the four front cover mounting screws (Fig. 1. �).

Safety Precautions:1) Do not place your finger or a tool in the gap between the PUSH TO CLOSE button and the OPEN-CLOSED indicator

(Fig. 16. ①) since this gap is closed when the breaker is closed.2) Never attempt to put your hand or a tool into the breaker when the closing springs are charged.

Be sure to discharge the closing springs prior to internal inspection.



� Fig. 16. Location of internal accessories, motor charging type

Open-closed indicatorPush to close buttonCharging motorCharged indicator switchLatch release device (LRC)Auxiliary microswitchMagnet hold trigger (MHT)Shunt trip device (SHT)Anti-pumping hold relay (HC)Breaker front part protective cover

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1) General view of shunt trip device.

Table 1, coil resistance values (reference values).

(1) Periodic inspection.

(2) Replacement of SHT.

‐ Take out the breaker body from the draw-out cradle.

‐ Set the breaker body so that the bottom surface is visible (see Fig. 17).

‐ Remove the two wires from the SHT terminals (Fig. 17. ⑦).

‐ Remove the two support mount screws (M5 and M4, one each) (Fig. 17. ②) and take out the SHT.

‐ After checking the light movement of the moving core (Fig. 17. ⑥) of new SHT, mount it in the breaker as it was.

‐ Connect the two wires to the SHT terminals (Fig. 17. ⑦).

‐ Test the SHT both electrically and mechanically for normal operation.

Rated voltage (V) Coil resistance (Ω)

421 ~ 480 472

AC380 ~ 420 352

180 ~ 250 101

100 ~ 150 25

150 ~ 230 161

DC90 ~ 125 36

48 9.7

24 2.7

Inspection item Method / Criteria / Dispoition

� Push the moving core of SHT with a pointed tool, such as screwdriver tip, then slowly

release the core. The result is acceptable if the core returns lightly.

Operation � Slowly push in the moving core after closing the breaker.

The result is acceptable if breaker trips open.

� If the breaker trips open at less than 70% of the rated voltage after closing the breaker,

the result is acceptable.

Coil � Measure the coil resistance with an ohmmeter.

� If it is much lower than the value shown in table 1 or there is no continuity, replace the SHT.

Terminals and � Check terminals and mounting screws for loosening.

mounting screws Tighten them if loose.



� Fig. 17. Shunt trip coil (bottom view)

Support Support mounting screwYokeYoke mounting screwCoilMoving coreTerminal

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2) Under-voltage trip device.

�The coil of under-voltage trip device (UVT) uses only DC rating.

�This under-voltage trip device includes instantaneous trip type AUT-1BS or HATS-U and time delay trip type

AUT-1BD or HATS-T having 500-㎳ time delay characteristics.

The UVT function lock is a standard option (for function lock, refer to locking function of UVT (4), page 22).

(1) General view of under-voltage trip device.

UVT cover UVT cover mounting bolt Wire terminals (fasten terminal)UVT coilUVT mounting bolt (2-M5X10)Wire terminals (fasten terminal)


Inspection item Method / Criteria / Disposition

� The breaker is trip-free when the UVT is de-energized.

Because of this, when the PUSH TO CLOSE button is depressed, the closing springs are

discharged, but if the breaker is not closed, the result is acceptable.Operation

� If the breaker can be closed at more than 85% of the rated voltage, the result is acceptable.

� If the breaker can be tripped at 70 to 35% of the rated voltage after closing breaker,


� Measure the coil resistance with an ohmmeter.

Coil resistanceIf the measured resistance is much lower than

the value shown in the right or there is no

continuity, replace the UVT.


mounting screws Retighten them if loose.

(3) Replacement of UVT.

When it is necessary to replace the UVT, replace the whole UVT unit.

‐ Remove the UVT cover (Fig. 18. ①).

Pull out the wire terminals (fasten terminals �, �, � and � (Fig. 18. ③)).

‐ Remove two UVT mounting screws M5 10 (Fig. 18. ⑤). Take out the UVT.

‐ Remove the UVT cover of a new UVT.

Install the UVT on the breaker body with UVT mounting screws (Fig. 18. ⑤).

‐ Connect the wire terminals (fasten terminals �, �, � and � (Fig. 18. ③)) sequentially from the right.

‐ Install the UVT cover. Install the OCR front protective cover.

Test the UVT both electrically and mechanically for normal operation in the same manner described in Fig. 18.

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Rated voltage (V)

100-470 V AC100-200 V DC

Coil resistance(ohms)

160 ± 16



� Fig. 18. UVT control device

3) Latch release device.

See table 1. given in 1) (page 20) shunt trip device for the coil resistance values.

(1) General view of latch release device.

(4) Locking function of UVT.

During the inspection and maintenance, the breaker can be closed without supplying the voltage to the UVT,

locking its function.

‐ Hold the ADJ nut with a tool such as pliers, then pull it up to the position in which it stops

(Refer to Fig. 19).

‐ Pull the lock lever up to the position in which the positioning stopper comes off, then rotate it in the arrow-

marked direction shown in Fig. 19, and hook it on the switch actuator pin for locking (Refer to Fig. 19).

This condition is the same as when the specified rated voltage is supplied, making it possible to close the

breaker.

Perform inspection and maintenance.

‐ After completion of inspection and maintenance, hold the ADJ nut with pliers and rotate the lock lever in the

reverse direction of the arrow in Fig. 19 for unlocking.

This returns the switch actuator pin to the original position.

‐ In the function lock condition, the lock lever remains protruded forward, making it impossible to install the

OCR front protective cover.

After checking that the function lock is released (Fig. 1. �), install the OCR front cover.

Never apply voltage to the UVT terminals � - � (page 52 circuit diagram) when the UVT function is locked.Doing so may cause burn-out of the equipment.

Never loosen or tighten the ADJ nut.Doing so may cause a malfunction.



� Fig. 19

� Fig. 20. LRC mounting

LRC mounting screwYokeYoke mounting screwMoving coreCoilTerminal

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Auxiliary switch unitLock leverOperating lever Operating armActuator slide plateShaftShaft conn. nutSupport mounting screwsSwitch mounting screwS/WasherSupport


(3) Replacement of LRC.

‐ Remove the wires from the LRC terminals (Fig. 20. ⑥).

‐ Remove one M5 LRC mounting screw (Fig. 20. ①), and take out the LRC from the breaker body.

‐ After checking the light movement of the new LRC moving core (Fig. 20. ④), mount it in the breaker as it was.

‐ Connect the wires to the LRC terminals (Fig. 20. ⑥).

‐ Test the device both electrically and mechanically for normal operation in the same manner described

in ② (periodic inspection table).

4) Auxiliary switch unit.

HAT06 ~ HAT40.

‐ In the case of draw-out type, auxiliary switches operate only when the breaker body is in the CONN.

or TEST position. Further, where the ship classification society’s rules are applied.

They operate only in the CONN. position.

‐ The auxiliary switch unit itself is mounted ON the draw-out cradle and mechanically linked to the breaker

switching mechanism.

(1) General view of auxiliary switch unit and contact arrangement.

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� Push the moving core with a pointed tool, such as screwdriver tip, then slowly release the core.

The result is acceptable if the core returns lightly.

Operation � Charge the closing springs and push the moving core.

The result is acceptable if the closing springs are discharged.

� If the breaker can be closed at 85% of the rated voltage, the result is acceptable.

Coil resistance� Measure the coil resistance with an ohmmeter.

If it were much lower than the value shown in table 1 or there is no continuity, replace the LRC.


mounting screws Tighten them if they were loosened.



� Fig. 21. Aux. SW. mounting layout (for HAT06~HAT40)


(3) Replacement of auxiliary switch unit (Fig. 21).

The auxiliary switch unit is an assembly of 10 switch elements (5 a-contacts and 5 b-contacts).

Replace the whole switch unit even if a defect is partial.

HAT06 ~ HAT40 (Fig. 21).

‐ Remove the one M4 shaft connecting nut (Fig. 21. ⑦).

‐ Remove the three M5 support mounting screws (Fig. 21. ⑧).

‐ Pull out the shaft (Fig. 21. ⑥) from the operating arm (Fig. 21. ④), and remove the auxiliary switch unit.

‐ Fit the shaft (Fig. 21. ⑥) of the new auxiliary switch unit into the square hole in the operating arm (Fig. 21. ④).

‐ Tighten the three M5 support mounting screws (Fig. 21. ⑧).

‐ Tighten the one M4 shaft connecting nut (Fig. 21. ⑦).

‐ Check the switch unit for normal operation in the method described above (2) periodic inspection.

HAT50 (Fig. 21-a).

The auxiliary switch unit comprises two rotary switch units linked to the operating mechanism.

Upper rotary switch unit contains 4 poles, and lower rotary switch unit contains 4 poles, a total of 8 poles

(four “a” and four “b” contacts).

Some of the poles may be harmed.

You should exchange with new AUX-SW-UNIT (if UVT were fitted, three “a” and four “b” contacts).

‐ Remove OCR front cover.

‐ Remove the two AUX-SW-MOV-LEVER MOUNTING NUT (Fig. 21-a. ⑩).

‐ Remove the four AUX-SW-UNIT-MOUNTING-BOLT (Fig. 21-a. ⑫).

‐ Disconnect AUX-SW-UNIT and AUX-SW-MOV-LEVER-UNIT (Fig. 21-a. ⑤).

‐ Remove upper-cover/50 (Fig. 21-a. ⑨) from disconnected AUX-SW-UNIT.

‐ Fit the removed upper-cover/50 (Fig. 21-a. ⑨) into new AUX-SW-UNIT.

‐ Connect AUX-SW-Unit and AUX-SW-MOV-LEVER-UNIT (Fig. 21-a. ⑤) according to the origin.

‐ Tighten AUX-SW-UNIT-MOUNTING-BOLT (Fig. 21-a. ⑫).

‐ Tighten AUX-SW-MOV-LEVER-UNIT-MOUNTING-NUT (Fig. 21-a. ⑩) with loctite (a sort of glue).

‐ Check the switch unit for normal operation.


� Take the breaker body out of the draw-out cradle.

� Connect the ohmmeter or alarm (buzzer) to each switch element.

� Lower the lock lever (Fig. 21. ②) for unlocking, and move the operating slide plate (Fig. 21. ⑤) Operation up and down to check each switch element for continuity.

- When actuator slide plate is located in the up position, the breaker’s state is CLOSED.

- When actuator slide plate is located at the down position, the breaker’s state is OPEN.

� Check that a-contact is ON and b-contact is OFF when breaker is closed, and that a-contact is OFF and b-contact is ON when breaker is OPEN.

� Check each contact for surface roughness (removing laminated phenolic plate from unit permits Contact surface visual check of contacts).

� If contact is excessively worn or rough, replace whole switch unit.


mounting screws Tighten them if loose.



5) Anti-pumping hold relay (HC).

(1) General view of anti-pumping hold relay.

Open springSide-plate mounting screws (both side M5)Side plate supportWire terminals (slip-on receptacles)Motor control unit PC board2-M4 mounting screws PC board

ClipRelay (HC)PC board

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� Fig. 21-a. for HAT50

� Fig. 22. Motor control unit PC board as mounted bottm view

� Fig. 23. Relay (HC)

Aux. fix base/RAux. fix base/LBase coverAux. contact/50Aux. SW. mov. lever unitGuide bar bolt/50Aux. SW. linkAux. link/AUpper cover/50Aux. SW. mov. lever unit mounting nutUpper cover/50 mounting boltAux. SW. unit mounting boltSplit pin

(2) Operation check.

Open and close the breaker through electrical control to check the relay for normal operation.

Do this in the following procedure.

‐ With the push-button switch (Page 52, PB “CLOSE”) ON, close the breaker.

‐ Immediately place the closed breaker in open condition.

Even when the closing springs are “CHARGED”, if the breaker is not placed in re-closed condition,


For resetting, turn the push-button switch (Page 52, PB “CLOSE”) OFF.

(3) Replacement of HC.

‐ Take the breaker body out of the draw-out cradle.

‐ Place the breaker in OPEN condition.

‐ Set the breaker body so that the bottom surface may be visible (See Fig. 22).

‐ Remove the opening spring (Fig. 22. ①).

‐ Remove the side-plate support mounting screws (one each for right and left) (Fig. 22. ②) to take out

the side plate support (Fig. 22. ③).

‐ Remove the two M4 mounting screws for PC board (Fig. 22. ⑥).

‐ Take out the clip fixing the relay (HC) (Fig. 23. ⑦), and remove the relay (HC) (Fig. 23. ⑧) from PC board.

‐ Insert a new relay (HC) into PC board (Fig. 22. ⑤, Fig. 23. ⑨), and fix it with a clip.

‐ Check that the connected wire terminals (fasten terminal) are inserted securely.

If required, remove them once, and insert them securely once again.

‐ Install PC board in the original place of the breaker with two M4 mounting screws for PC board.

‐ Install the side-plate support in the original position with the right and left side-plate support tapping screws.

‐ Install the opening spring.

‐ Check the relay for normal operation.

6) Direction of ACB position padlock device.

(1) Object

Position padlock device is designed for the process of locking position of ACB

(isolated, test or connection position) by using shackle.

(2) Mounting

Position padlock device protrudes at the front cover face.

In case of using this device, pull out padlock lever by hand and lock it with shackle.

‐ This device is connected with handle-shutter at front cover face.

So if it is pushed abnormally or handle-shutter is opened, the ACB will be tripped or will not be closed.

‐ If someone pushes the position padlock lever and does a draw-out operation through the opened handle-

shutter during running time, this will cause a fatal accident.

� Do not push position padlock lever. This is the cause of tripping ACB during running time.� Shackles must be used to lock this device. Otherwise this can cause mis-operation.

� Do not operate the draw-out handle during running time.Since main circuit is alive, draw-out operation will cause fatal accident.

It is not necessary to remove the connected wire terminals (fasten terminal) (Fig. 22. ⑧).



Over-Current Protective Device06

Long time delay tripped indicator light (LED)Pre-trip alarm indicator light (LED)Short time delay tripped indicator light (LED)Ground fault time delay tripped indicator light (LED)Instantaneous/MCR tripped indicator light (LED)Reset buttonTest switchContact outputs for tripped indicationControl circuit terminalsTest connectors

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21

Base current select switchLong time delay trip pickup current setting dialLong time delay setting dialShort time delay trip pickup current setting dialShort time delay setting dialInstantaneous trip pickup current setting dialPre-trip alarm time delay setting dialPre-trip pickup current setting dialGround fault time delay setting dialGround fault trip pickup current settingSystem alarm indicator light (LED)

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� Fig. 24. EX: AOR-1L-GS type


Type AOR multifunction protective device is a CPU loaded, high-reliability, multifunctional protective device.

This device is classified into types AOR-1L (for general feed circuits), and type AOR-1S (for generator protection).

Refer to the following protective function combination table.


� Protective function combination table

※ The function check is provided in type AOR multifunction protective device with CP/I, allowing a simple field test.

AL

AL

AL

AL

AL

AL

AL

IU Contact for operation indication (whole)

Ground fault trip

AOR-1L-AL AOR-1S-AL

AOR-1L-AM -

AOR-1L-AS AOR-1S-AS

AOR-1L-GM -

AOR-1L-GL -

AOR-1L-GS -

AOR-1D-GM -

Tripped LED indicator & contact (individual)

Long time delay trip

Pre-trip alarm

※ Function is an option

Short time delay trip

Instantaneous trip

AG

CP/I

AL

AP

AS

AI

Indicationfunction

For generalfeeder circuits

For generatorprotection

Type AOR multifunctionprotective device

�

�

�

�

�

�

�

CP/I

CP/I

CP/I

CP/I

CP/I

Protective function

AS

AS

AS

AS

AS

AS

AS

AI

AI

AI

AI

AI

AI

AI

AP

AP

AP

AP

AP

MCR

MCR

MCR

MCR

MCR

AG

AG

AG

AG

IU

IU

IU

IU

IU

MCR

6.1 Base Current [Io] of Type AOR Multifunction Protective Device

� Base current [I0] can be adjusted to 50%, 63%, 80% and 100% of the rated primary CT current [1CT]

� On the type AOR multifunction protective device nameplate, the following is marked:

BASE CUR. I0: A

� Base current [I0] can be selected by rotating the base current setting select switch (Fig. 24. ①),

which can be set to the predetermined scale.

� A proper CT is selected according to the rated current [IGEN] of generator.

Then, base current [I0] is adjusted so as to be equal to the rated current value [IGEN] of generator according to the input

match inside AOR-1S.

Accordingly, the rated current value [IGEN] of generator corresponds to base current [I0].

On the type AOR multifunction protective device nameplate, the following is marked: BASE CUR. I0: A

Type

AO

R-1L

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Type

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R-1S

(fo

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Base current [I0]

6.2 Protective Functions and Setting Ranges of Type AOR Multifunction Protective Device

� Setting dial is scaled in multiples of [I0]. There are eight discrete settingpositions: NON, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05 and 1.1 times I0.

� When [I0] is set at NON the protective function does not operate.

� The breaker is not tripped at less than 105%, and tripped at more than 120% of [I1] setting.

� Setting dial is scaled in multiples of [I0].There are seven discrete settingpositions: NON, 0.8, 1.0, 1.05, 1.1,1.15, 1.2 and 1.25, of [I0] setting.

� When [I1] is set at NON, the protective function does not operate.

� Setting dial is scaled in multiples of [I0].� There are eight discrete setting

positions: NON, 4, 6, 8, 10, 12, 14 and16 times [I0].


� Setting dial is scaled in multiples of [I0].� There are eight discrete setting

positions: NON, 4, 6, 8, 10, 12, 14 and16 time [I0].


� The setting dial is scaled in seconds,which is the operating time at 600% of [I1] setting. There are nine discretesetting position: 0.5, 1.25, 2.5, 5,10, 15, 20, 25 and 30 seconds.

� The breaker is tripped at the range from95% to 105% [T1] setting.When [ICT] is less than 160 A, the breaker is tripped at the range from 90% to 110% [I1] setting.

� The setting dial is scaled in seconds, which is the operating time at currentflow of 120% of [I1] setting.There are seven discrete positions:15, 20, 25, 30, 40, 50 and 60 seconds.

� Time setting is unnecessary.

Long

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trip

(I1 ,

T1)

Inst

. trip

(I3 )

AO

R-1S

type

(fo

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AO

R-1S

type

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OR-

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OR-

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(for

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Current setting range Time setting range




� Setting dial is scaled in multiples

of [I0].

There are eight discrete setting

positions: NON, 2, 2.5, 3, 4, 6, 8, 10

times [I0].

� When [I2] and [I3] are set at NON,

the device is operated at 1000% of

[I0] setting as a fail-safe function by

[T2] setting.


of [I0].

There are eight discrete setting

positions: NON, 2, 2.5, 2.7, 3, 3.5,

4 and 4.5, 5 times [I0].

� When [I2] is set at NON, the device

is operated at 500% of [I0] setting

as a fail-safe function.

� Setting dial is scaled in milliseconds,

which is the operating time at current

flow higher than [I2] X 120% setting.

� There are seven discrete 80, 160,

240, 320, 400, 480, 560 milliseconds.



flow higher than [I2] x 120% setting

� There are seven discrete setting

positions: 80, 160, 240, 320, 400,

480, 560 milliseconds.

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of OCR rated primary current [ICT].


of [ICT].

There are seven discrete setting

positions: 0.1, 0.15, 0.2, 0.25, 0.3,

0.35, 0.4 times [ICT].


of [I0].

� There are eight discrete positions:

0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05,

and 1.1 times [I0].


of [I0].

� There are eight discrete positions:

0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05,

and 1.1 times [I0].



flow higher than [I2] X 120% setting.

� There are seven discrete 80, 160,

240, 320, 400, 480, 560 milliseconds.

� There are nine discrete position

at current flow 120% of [IP]:

5, 10, 15, 20, 25, 30, 35, 40,

45 seconds.

� Setting dial is scaled in second which is

the operating time at current flow higher

than [IP] setting.

� There are eight discrete 60, 80, 120,

140, 160, 180, 200 seconds (definite

time delay).

Gra

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Pre-

trip

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AO

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AO

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type

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1) Method of changing protective function settings.

The settings of type AOR multifunction protective device can be changed easily by dial operation.

This section describes the basic procedures for setting the protective device.

For setting details of individual protective functions see Section 2.

(1) Basic procedures.

‐ Release two mounting screws from the transparent front cover, and remove the cover from the

OCR front cover (Fig. 1. �).

‐ Using a small flathead screwdriver, adjust the setting switches as appropriate.

The OCR has two types of setting switches: Rotary step switches and slide switches.

a) Rotary step switches: Rotate the dial until the arrow points to the desired position.

The setting is the same within the scale range denoted by a bold line.

b) Slide switches: Slide the switch knob up/down to turn ON/OFF.

‐ After adjustment, check the OCR for proper settings by using a filed tester or the like (HOC2, HOC3, HOC4).

Do not apply excessive force to the switches. The switches should lightly be turned or slid with the screwdriver.



� Fig. 25

� Fig. 26. Inst. setting current dial

Switch knob


‐ Return the transparent cover to its original position.

(2) The setting of slide switch.

‐ Frequency setting (50 ㎐/60 ㎐).

The frequency can be change between 50 ㎐ and 60 ㎐ depending on power system.

In case of OCR set at 60 ㎐ in 50 ㎐ system, the tolerance of OCR increases ±20% more than exact setting.

‐ Tripping time characteristics (I2t ON/OFF).

The STD trip timing can be changed between ramp (I2t=C: inverse-time) mode and definite-time mode.

When delivered, the breaker has been set to the definite-time mode.

To change the trip timing to the ramp mode, set the I2t - switch on the OCR to ON position.

‐ Tripping mode (INST/MCR).

Changeover of INST to MCR or vice versa is allowed at the OCR type which requires control power.

When delivered, INST trip timing are set to a mode specified on the order from.

Using the INST/MCR mode select switch enables the tripping mode to be changed between INST and MCR.

When changing the tripping mode to MCR, be sure to observe the following condition:

Estimated short-circuit fault current � Rated breaking capacity of the breaker (without INST).

※ MCR is a protective function which instantaneously trips open the breaker only when a fault current exceeding

I3 is applied to operate the breaker. After making operation, MCR locks the INST trip function.

※ MCR is an option: refer to ACB catalogue ordering form.

6.3 Operation Indication Functions of Type AOR Multifunction Protective DeviceThe operation indication function includes contact for tripped indication (whole indication) and LED light

and contact for tripped indication (individual indication).

1) Contact for tripped indication (whole indication).

� This contact output is one contact operating even when any one of LTD, STD, INST and GFT operates.

The contact is automatically reset after 40 ㎳.

� The contact output is transmitted between terminals 22 and 23 of disconnecting device for control circuit

(Fig. 24. �).

� Rating of contact for tripped indication rated voltage.

2) LED light and contact for tripped indication (individual indication).

� Control power is required for tripped indication.

Supply the following power between terminals 19 and 20 of control circuit disconnecting device (Fig. 24. �).

‐ 100 V AC to 125 V AC/5 VA or 200 V AC to 250 V AC/5 VA.

‐ 100 V DC to 125 V AC/5 W or 200 V DC to 250 V DC/5 W or 240 V DC/5 W.

Rated voltage 250 V AC 30 V DC 125 V DC 250 V DC

Rated current (resistive load) 8 A 5 A 0.5 A 0.3 A

Rated current (inductive load) 3 A 3 A 0.25 A 0.15 A


50 Hz

T2I2tOn

I3MCR

INSTOff60 Hz

IU

IU

CP/I

CP/I

When a fault current exceeds 8 times (in case of the OCR 8 times),

the base current [I0] and the ramp (I2t=C) mode will be changed to

the definite time mode.

Time setting tolerance of ramp characteristic: (T2 ± 30%)

� When LTD, STD/INST or GFT operates, the LED lights for tripped indication (Fig. 24. ⑨, ⑩, ⑪) light up individually.

� At the same time, the contact signal ON is outputted individually between terminals � - �, � - �, � - � of

control circuit disconnecting device (Fig.1. �).

� The LTD, STD/INST and GFT tripped indications remain ON until the reset button (Fig. 24. �) is depressed or the

control power is turned OFF.

By pressing the reset button or turning the control power OFF for more than one second, the ON state is reset.

� LED light and contacts for pre-trip alarm operation indication.

‐ The LTD pickup indication LED light (Fig. 24. ⑬) flickers at more than pickup current value [IP].

At the same time, the contact signal ON is outputted between terminals 22-28 of control circuit

disconnecting device (Fig. 24. �).

‐ The operation indication is automatically reset if the current of less than [IP] is reached.

� CPU malfunction indication LED lights and contact.

When the analog circuit is abnormal, CPU malfunction indication LED light (Fig. 24. ⑪) lights up, and at the

same time, the contact signal ON is outputted between terminals 22-24 of control circuit disconnecting

device (Fig. 24. �).

If CPU malfunction indication LED light lights up: The breaker in service is not effected directly but take the

following measures at earlier stages, and eliminate the trouble.

Press the reset button (Fig. 24. �). If the abnormality is temporary, such as noise, the LED will go OFF.

At that time, the control function returns to normal. If the LED does not go off even by a push of the reset button,

some abnormality may occur. In this case, immediately contact HHI.

� Rating of contact for tripped indication.

6.4 Field Test Method of Type AOR Multifunction Protective Device

1) Function check method.

� A simple check of operation for type AOR multifunction protective devices (AOR-1L-AS, AOR-1L-GS, AOR-1S-AS,

AOR-1L-AM, AOR-1L-GM, AOR-4L-GS, AOR-4L-GM) can be made with a test switch.

� Function check of the ground fault trip function is not possible.

� Function check of type AOR-4L should be made in the same manner as type AOR-1L function check.

(1) Control power and tools to be prepared.

‐ Watch: Watch that can measure the seconds (such as a stopwatch).

‐ Flat-bladed screwdriver.

‐ Control power is indicated on the type AOR multifunction protective device nameplate.

If making function check in the TEST position, confirm that the control power is applied across

the terminals 19 and 20.

24 V DC between SP(+) - SN(-) terminals.

100 to 250 V AC, DC between S0 - S2 terminals.

To check each protective function, draw out the breaker to the ISOLATED position, or take it out from the draw-out cradle. If making a function check in the TEST position, confirm that there is no influence on the sequence.



Rated voltage 125 V AC 220 V DC

Rated current (resistive load) 125 VA (2 A max.) 60 W (2 A max.)

Rated current (inductive load) 20 VA (2 A max.) 10 W (2 A max.)

AS, GS type AM / GM type

22: Common terminal 26: STD/INST terminal 22, 25 Common

25: LTD terminal 27: GFT terminal 26, 27 LTD STD INST GFT


� Function check method for each protective function.

� Close the breaker.

� When the STD INST pickup current value is less than 6 times of the base current in type AOR-1L, set each dial to

NON with a flat-bladed screwdriver.

� Push the test switch (Fig. 24. �) to “LO” (current flow of 6 times the base current [I0] in type AOR-1L, and 1.2 times

the base current in type AOR-1S), and at the same times, start the tripping time measurement with a watch.

Also hold the test switch until the breaker is tripped.

� After tripping, release the test switch.

It is reset to OFF (neutral) automatically.

� Read the tripped time.

If it is nearly equal to the operation time at the current flow of 6 times [I0] for type AOR-1L and 1.2 times [I0] for type

AOR-1S, it is normal.


� Push the test switch (Fig. 24. �) to “HI” current flow of more than 16 times the base current [I0].

If the breaker is tripped momentarily, it is normal.


It is reset to OFF (neutral) automatically.

Long

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trip

func

tion

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Protective function Type AOR-1L (for general feeder circuit), Type AOR-1S (for generator protection)


� Set the INST pickup current setting dial to NON, using a flat-bladed screwdriver.

� Push the test switch (Fig. 24. �) to “HI” current flow of more than 16 times the base current [I0].

If the breaker is tripped with time delay setting, it is normal.


� Return the INST pickup current setting dial to the original set value with a flat-bladed screwdriver.


2) Characteristic check method.

The tripping current value and time delay characteristics of each protective function are checked with secondary

current levels converted from the set value primary current supplied to CT.

� Test current value can be obtained from the conversion formula shown below.

Test current = (I/ICT) × 5 I: Set value [I1], [I2], [I3], [IP] or [IG].

ICT: Primary current of CT.

5: Secondary current value of CT.

Example) I: [I1] 900 A ICT = 1250 A test current = (900/1250) 5 = 3.6 A.

� For each protective function characteristic check, draw out the breaker to the Isolated position or take it out

from the draw-out cradle.

If making function check in the TEST position, do as follows:

Characteristic check can be easily made if HHI OCR checker (type HATS-HOC2) is used.

When the test apparatus other than HHI OCR checker is used, make the characteristic check according to the

following.

※ Remove the protective cover of type AOR multifunction protective device front (see Fig. 25).

It is not necessary to disconnect the test terminals (KA, KB, KC, n).

※ Remove the OCR front cover (Fig. 1. �).

Disconnect the connected test terminals and connect the solderless terminals to the same positions.

� As shown in table 2, connect the test equipment outputs to the test terminals (KA, KB, KC, n) of multifunction

protective device for characteristic check of each protective function.

Note that the internal circuit configuration is as described below when ground fault trip function is provided.

Pay attention to the connection with the test terminals.

Stop applying test current immediately after the breaker trips open.

Never apply voltage to terminals TP and TN.Doing so may cause burn-out.

Protective functionConnection to test terminals

Without GFT With GFT

Long time delay trip, short time delay trip, One out of KA, KB, KC Between KA - KB

instantaneous trip and pre-trip alarm and n terminal Between KA - KC

Ground fault trip - One out of KA, KB, KC and n terminal



� Fig. 27


(2) Test equipment, control power source and tools to be prepared.

‐ Watch: Watch that can measure the seconds (measure ms as needed).

‐ Flat-bladed screwdriver.

‐ Control power source.

No control power source is required for protection characteristic check.

When the operation indication LED light and contact output check is required, use the following power source

indicated on the nameplate of type AOR multifunction protective device.

If making the characteristic check in the TEST position, confirm that the control power is applied across

the terminals 19 and 20.

Check the operation indication LED lights for long time delay trip, short time delay trip/instantaneous trip

and ground fault trip by applying the control power, and reset them before proceeding to next step.

‐ Test equipment.

Prepare an adjustable setting current unit which can output a distortionless sinusoidal current.

A sample test equipment circuit is shown below.

Supply the power:

24 V DC between SP~SN(-) terminals.

100-250 V AC, DC between S0~S2 terminals.

Do not let TEST current flow more than the instantaneous trip pick current setting value (I3×1.2).Turn the test current OFF immediately when the breaker is tripped.


� Fig. 28

� Characteristic check method for each protective function.


� Increase the test current from zero; the LTD pickup indication LED pickup indication LED light (Fig. 24. ⑫)

flickers just before the LTD pickup current setting.

� Further, increase the test current slowly up to the position in which the LTD pickup indication LED light turns

to steady lighting; if the current value at that time is within the range of 1.05 to 1.2 times of secondary current

value converted from current [I1] for type AOR-1L, and within the range of ±5% of secondary current value

converted from current [I1] for type AOR-1S, it is normal.

� Reduce the test current output to zero.

Long

tim

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trip

func

tion

chec

k

Pick

up c

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heck

Trip

tim

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Protective function

Type AOR-1L (for general feeder circuit), Type AOR-1S (for generator protection)


� When the STD/INST pickup current setting is less than 6 times of the base current in type AOR-1L, set each dial

to NON with a flat-bladed screwdriver.

� Apply secondary current corresponding to 6 times the set value [I1] current for type AOR-1L and 1.2 times the set value

[I1] current for type AOR-1S.

At the same time, start the trip time delay measurement with a watch.

� Read the tripped time delay.

If the breaker is tripped within the range of set time [T1] sec ± 15%, it is normal.


� In step 2 above, return the STD/INST pickup current setting dial to the original set value with a flat-bladed screwdriver.





� Set the LTD/INST pickup current setting dial to NON, using a flat-bladed screwdriver.

� Rapidly apply the test current within ±15% (type AOR-1L) and ±10% (type AOR-1S) range of secondary current

converted from set value [I2] current; if the breaker is tripped, it is normal.


Shor

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trip

func

tion

chec

kIn

st. t

rip fu

nctio

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Sett

ing

curr

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me

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func

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Protective function



� Set the test equipment output to 1.2 times the secondary current levels converted from the set value [I2] current.

� Apply the test current. At the same time, start the trip time delay measurement with a watch.

� If the breaker is tripped, reduce the test equipment output to zero.

� Read the tripped time. If the tripped time is within the range of resettable time (ms) and maximum total clearing

time (ms) shown in the table below, it is normal.

Time setting (T2) (㎳)

7-step system 80 160 240 320 400 480 560

Reset table time (㎳) 55 120 190 260 330 400 460

Max. total clearing time (㎳) 150 240 335 425 520 610 700

� Return the LTD/INST pickup current setting dial to the original set value with a flat-bladed screwdriver.


� If the breaker is not tripped by applying the test current of -20% secondary current levels converted from the

set value [I3] current and tripped by applying the test current of +20% secondary current levels, it is normal.

Note: The test current should be applied for 50 ㎳.



� Increase the test current up to the position in which the LTD pickup indication LTD light (Fig. 24. ⑬) flickers:

if the current value at that time is within the range of ±7.5% (AOR-1L) and ±5% (AOR-1S) of secondary current levels

converted from the set value [TP] current, it is normal.


Pre-

trip

ala

rm fu

nctio

n ch

eck

Gro

und

faul

t trip

func

tion

chec

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Pick

up c

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Trip

tim

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Sett

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curr

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func

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Protective function


� Supply the specified control power.

� Apply the test current of 1.1 times (AOR-1L) and 1.2 times of (AOR-1S) of secondary current levels converted from the

set value [IP] current. At the same time, start the time measurement with a watch.

- If the time at which an alarm signal is outputted across terminals AC and AP is within the range of ±20%

(AOR-1L) and ±15% (AOR-1S) of the set value [TP] second, it is normal.

- Reduce the test current output to zero.


� Set the test equipment output to approx.

4 times the secondary current levels converted from the set value current.

� Apply the test current.

At the same time, start the trip time measurement with a watch.

� If the breaker is tripped, reduce the test equipment output to zero.

� Read the tripped time. If the tripped time value is within the range of resettable time (㎳) and maximum total

clearing time (㎳) shown in the table below, it is normal.

Time setting (T2) (㎳)

7-step system 80 160 240 320 400 480 560

Reset table time (㎳) 40 110 170 240 310 380 450

Max. total clearing time (㎳) 180 270 365 455 545 640 730


� Apply the test current within the range of ±20% of secondary current levels converted from the set value [IG] current:

If the breaker is tripped, it is normal.





3) Instruction manual of AOR-1D-GM type OCR.

(1) Key menu structure.


� Display screen (display phase current & setting values)

� Fault

� Set screen (set the value of protection function)

� Sys

� Tests

(2) Key manual.

It is very easy to access the menu, using key pad.

Main window.

Main window consists of display, fault, setting, system and test.

Push key and move to next window.

Push key to view upper menu, available from all menu windows.

AOR-1D-GM key pad

Display window.

In main window, put the cursor at Disp? by using Disp? and

push key.

This moves to display window.

This window displays load current, setting values and system setting values.

In display window, put the cursor at Curr? by using and

push key.

This load current window monitors Ia, Ib, Ic & In.

‐ Load current.

‐ Setting information.

In display window, put the cursor at Set? by using and

push key.

This moves to window of setting information.

By pressing continuously, user sees each value.




(ex. 1) If password were 1234, change the flicker “O” into “4”, press key and press or .

According to above method, set the other digits.

In set window, each item is represented as follows.

LTD Curr: I1, LTD time: T1, STD Curr: I2, STD time: T2, INST Curr: I3,

GFT Curr: Ig, GFT time: Tg, PRE-ALARM Curr: Ip, PRE-ALARM time: Tp.

(This example shows how to set the value)

Move cursor to the position of required modification.

Using key, set “4” and “O” and push key.

Then, the below screen will appear.

If user moves the cursor to “Y” and pushes key, the setting is finished.

If user moves the cursor to “N” and pushes key, the setting is canceled.

(ex. 2) If user wants to set I1=40%, put the cursor on I1 by using and push key in setting window.

This moves to the window below.

In the main window, put the cursor at Set? by using , and push .

This moves to the password check window. The default password is 0000 but the

user can change the password in sys window.

After inputting input pasword according to example 1, push key.

The set windows all appear.

Set window.

In main window, put the cursor at Fault? by using and

push key.

This moves to window of trip information.

This window displays the history of fault trip (up to 8 items) and the key will display

trip information 1-8 sequentially.

Fault window.

In display window, put the cursor at Sys? by using and

push key.

This moves to system information window.

‐ System information.


In sys window, user can set the communication port, password, CT ratio,

Hz, load type and the characteristic curve of overload.

In main window, move cursor to Sys? by using and press key.

Password check window appears and input the password.

Then the below screen will follow.

This sample shows how to set the value of communication address.

Sys window.

(ex. 3) Put the cursor on Add? and push key.

If communication address is 1, push key and select “1” and than

push key.

Put the cursor on “Y” and push key.

The setting is finished.

User can easily check the functions of OCR.

In main window move cursor to Test? by using , and press key.

Password check window appears. Input the password.

Then the below screen will follow. In case of non-trip function, ACB does not

operate but only OCR simulates LTD, STD & INST trip like a real fault.

In case of trip function, OCR simulates LTD, STD & INST trip and gives a trip signal to

ACB, then ACB operates trip mechanism.

Test window.

(ex. 4) In case of trip function, put the cursor on Trip? and push key.

Select LTD among LTD, STD, INST and push key.

OCR simulates according to setting value: alarm and fault lamp light on and

ACB is tripped.

Push key to reset the fault in this screen.



� AOR-1D-GM terminal block


(3) AOR-1D-GM terminal block.


� AOR-1D-GM connection diagrams

(4) AOR-1D-GM connection diagrams.




4) General directions for testing at primary current levels.

When a single-phase current source is used to test the breaker, observe the following directions.

� Temperature test.

If a single-phase test current equal to the rated current is applied to a breaker with its three poles connected

in series for temperature test, the breaker will be tripped.

This is because two out of the test currents in the same directions and the pickup circuit in the type AOR

multifunction protective device see twice the actual current flow.

Therefore, to prevent the breaker from being tripped during the temperature test, short the multifunction

protective device test terminals KA, KB, KC and together.

� Over-current trip test.

When a trip test is performed on a breaker with a test current supplied to its main circuit, in the same manner

as in the temperature test, do this for each pole so that 2 out of the three poles are not in the same direction

(not allowed when ground fault trip is provided) or with 2-poles.

The insulation resistance test and dielectric withstand test for main circuit and control circuit are performed as follows:

7.1 Main Circuit

1) Dielectric with stand voltage characteristic is 3500 V AC for one minute.

2) Use a 500 V DC insulation resistance tester (Megger).

7.2 Control Circuit (to Earth)

1) Dielectric withstand voltage characteristic is 1500 V AC for one minute.

For 24 V DC rating of motor charging and closing operation circuits, its characteristic is 500 V AC for

one minute (control circuit terminals 1, 2, 3).

Also for DC rating of the following control circuits, dielectric withstand test is impossible.

� Control circuit terminals 9 and 10 of under-voltage trip device (UVT), for both AC and DC ratings,

and terminals 19 and 20 of type AOR multifunction protective device.

2) Use 500 V DC insulation resistance tester (Megger) for insulation resistance test.


Insulation Resistance Test and Dielectric Withstand Test07

Troubleshooting Points08

� Abnormality of UVT.- Lack of trip force.- Residual magnetism.

� Abnormality of SHT.- Cut or short of coil.- Decrease of source voltage.- Lack of moving core stroke.- Defect of control circuit.

� Abnormality of OCR.- Defect of OCR.- Cut of CT coil.

� Roughness of moving parts by missing greasing.

� Sliding between feed lever and ratchet.

� Defect of charging motor.- Abnormality of control source.- Defect of control circuit.- Defect of motor pinion or gear.- Defect of motor.

� Loosening of terminal screws.

� Contact. - Lack of compression force. - Roughness of compression plane.- Contamination of compression plane.

� Rise of ambient temperature.

� Mis-wiring in supply lines.� UVT operated.� Spring discharged.

�

- Confirm the state of spring if any harm detected, change or fix it.

- Confirm the moving operation of moving part.If any harm detected, fix it or refer to HHI.

- If any contamination is attached, remove it.- Change the whole kit.

�

- Change the coil.- Supply normal source voltage.- Refer to HHI.- Check the relay and revise the control circuit.

�

- Refer to HHI.

�

- Remove dust and inject grease.- Check the abrasion degree of ratchet, roller

and shaft.If any trouble has taken place, refer to HHI.

� When the return spring of feed lever is cut, change it.When abrasion has taken place in feed lever or ratchet, change it.

�

- Supply of normal control source.- Revision of control circuit.- Change motor unit.

� Fix the terminal screws.

�

- Regulate compression force or refer to HHI. - Grinding contact or changing. - Clean the plane.

� Install the venting equipment.

� Check the control lines with schematic diagram.� Check UVT line and pickup condition in terminal

9 & 10.� Charge spring.

1

2

3

4

The breaker cannot be closed

Overheat

The breaker cannot becharged

The breaker cannot be tripped

Troublephenomena

No. Expected causes Corrective actions



Draw-Out Mechanism of HAS Type09

The draw-out mechanism permits one to draw out and remove the breaker body from the draw-out cradle and

to put the breaker body back into the cradle, thereby facilitating the inspection and parts replacement.

The draw-out mechanism permits one to move the breaker body to any of the following three positions in the

draw-out cradle.

In this position, the main circuit and the control circuits (of the bresker) are connected to the external circuit for

normal service.

This position permits tests such as close-open test, control circuit function test, etc.

In this position, the main circuit is isolated, and the control circuits are connected.

This position permits tests such as close-open test, control circuit function test, etc.

In this position, the main circuit and the control circuits are isolated.

The breaker is completely de-energized in this position.

9.1 Moving the Breaker Body Within Draw-Out CradleThe draw-out handle (Fig. 29. ①) is used to move the breaker body from CONN. to TEST or from TEST to CONN.

in the draw-out cradle.

1) Moving from “CONN.” to “TEST” position.

‐ Confirm ACB is in “OPEN” condition.

If the ACB is in “CLOSE” position open the ACB by pressing “Push to Open Button”.

‐ Push down the rail hook lever (Fig. 29. ②, ③).

‐ Fix the D/O handle(s) (Fig. 29. ①) into pin (Fig. ②) and pull the handle front side.

‐ Remove the D/O handle(s) (Fig. 29. ①).

‐ Draw-out the breaker body until it is in “TEST” position.

If breaker body arrives at the “TEST” position, it is locked automatically.

2) Moving from “TEST” to “REMOVAL” position.


‐ Draw-out the breaker body from “TEST” position until it is locked automatically.

CONN. Position

TEST Position

REMOVAL Position


� Fig. 29

9.2 Putting the Breaker Body Back into Draw-Out CradleFollow the procedure given below to put the removed breaker body back into the draw-out cradle.

‐ Check that the breaker is “OPEN”.

‐ Check that the spring charged indicator is showing “DISCHARGED”, indicating the closing springs are discharged.

‐ Lift up the breaker body or, using a special lifter, push in the breaker body until the draw-out stoppers are locked

so that the slide plate of the breaker body side may be engaged with the slide plate of the draw-out cradle side.

‐ At the “REMOVAL” position, after pushing down rail hook lever (Fig. 29. ②, ③), insert breaker body until it is in

“TEST” position. If breaker body arrives at the “TEST” position, it is locked automatically.

To confirm the “TEST” position, refer to the sticker left of the draw-out cradle.


‐ Insert the breaker body until isolating contact (Fig. 29. ④) is touched.

‐ Fix the D/O handle(s) (Fig. 29. ①) into pin (Fig. 29. ②, ③) and lift up the D/O handle(s) (Fig. 29. ①).

If the breaker body arrives at “CONN.” position, it cannot be inserted any more.

Confirm the “CONN.” position according to sticker left of the draw-out cradle.

‐ Don’t forget to confirm that the state of the rail hook lever (Fig. 29. ②, ③) is upward.



Circuit Diagrams of AOR10A

OR-

1L-G

S /

4L-G

SA

OR-

1L-G

M /

4L-

GM

AO

R-1L

-GL

/ 4L

- G

L

3-phase 4-wire 4-pole type 3-phase 4-wire 3-pole type

CT1 ~ CT3: for HAT06, 08, 10, 12, 16, 20CT4 ~ CT6: for HAT25, 32, 40, 50



AO

R- 1

L-A

S /

1S-A

SA

OR-

1L-A

MA

OR-

1L-A

L /

1S-A

L

3-phase 3-wire 3-pole




Circuit Diagrams of HAT11

Main Circuit Over-Current Protective Device

Under-VoltageTrip

Motor ChargingClosing Circuits

CT1-3 : CT for over-current trip for types HAT06 to HAT20.

CT4-6 : CT for over-current trip for types HAT25 to HAT40.

Do not use these output contacts in circuits exceeding 250 V AC or 220 V DC.

�1: Fitted with circuits rated 240 V and 250 V AC.

�2: For circuits of rated control voltage 125 V DC.

�3: For circuits of rated control voltage 200 V to 220 V.

Main Circuit

Over-Current Relay (OCR)

Under-Voltage Trip (UVT)

Condenser Trip

Motor Charging/Closing Circuits

Spring Charge Switch Contact

Shunt Trip (SHT)

Trip Indication Switch

Auxiliary Switch

CT: Current transformer for OCR

Control power for terminals (CP/I)

Common line for ind. contact (IU)

Ind. contact (CP/I)

Ind. contact (CP/I)

Ind. contact (CP/I)

Pre-trip alarm (CP/I)

Magnetic hold trigger

Source

Remote electrical tripping

Under-voltage trip coil

AUX. SW. Auxiliary switch

Spring charge switch contact

Source

Closing circuit

Charging motor

Hold relay

Latch release coil

PB Push button switch

Shunt trip coil

Source



Condenser trip source

Condenser trip

Trip indication SW.

Auxiliary relay (not supplied)

Auxiliary switch

19 20

23

25

26

27

28

22

22

22

22

22

9

AL

AS AI

AG

AP

10

11 12

3 15

1 2

3

7 8

U V

P N

13 14

X1

31 50

MHT

UVT

LRC

SHT

M

HC

DC 24 V SP-SN

AC, DC 100-250 V S0-S2

11.1 Type HAT06~40


CapacitorTrip

Trip Ind.SW.

ShuntTrip Auxiliary SW. Position SW.

Draw-out type: The Aux. SW. operate in the connectedand test positions only.When marine classification society’s rules are applied they operate in the connectedposition only.

1 3 7 9 11 13 15 17 19 21 23 25 27 29

2 4 8 10 12 14 16 18 20 22 24 26 28 30

Charging motor

Hold relay (anti-pumping)

Latch release coil (closing)

— Manufacturer’s wiring

… User’s wiring

-＜＜- Disconnecting device

Test 61-62 ON

position 61-63 OFF

64-65 ON

64-66 OFF

67-68 ON

67-69 OFF

Connected 71-72 ON

position 71-73 OFF

74-75 ON

74-76 OFF

77-78 ON

77-79 OFF

Terminal Arrangement of Control Circuit

(FIX Type)

123

4789

10111213

1415

16171819202122

2324

25262728

29

30

OCR Circuit Diagram for 4-pole

AOR-1L-GLAOR-1L-GMAOR-1L-GS

AOR-1D-GM

M

HC

LRC

(AUX. SW.)

(CONTROL CIRCUIT)

(AUX. SW.) (CONTROL CIRCUIT)

(D/O Type)

71 72 73

61 62 63

Test S.W.

Connect S.W.

� �

��

�

�

31 33 35 37 39 41 43 45 47 49

B1 A1 B2 A2 B3 A3 B4 A4 B5 A5

32 34 36 38 40 42 44 46 48 50

31 33 35 37 39 41 43 45 47 49

B1 A1 B2 A2 B3 A3 B4 A4 B5 A5

32 34 36 38 40 42 44 46 48 50



Circuit Diagrams of HAT11

Do not use these output contacts in circuits exceeding

250 V AC or 220 V DC.

�1: Fitted with circuits rated 240 V and 250 V AC.

�2: For circuits of rated control voltage 125 V DC.

�3: For circuits of rated control voltage 200 V to 220 V.

Main Circuit

Under-Voltage Trip (UVT)

Condenser Trip

Motor Charging/Closing Circuits

Shunt Trip (SHT)

Trip Indication Switch

Auxiliary Switch

CT: Current transformer for OCR

Source

Remote electrical tripping

Under-voltage trip coil

Source

Closing circuit

Charging motor

Hold relay

Latch release coil

Spring charge switch

Shunt trip coil

Source



Condenser trip source

Condenser trip

Trip indication SW.

Auxiliary relay (not supplied)

Auxiliary switch9 10

11 12

1 2

3

3 15

7 8

U V

P N

13 14

X1

31 46

UVT

LRC

SHT

M

HC

Spring Charge Switch Contact

Spring charge switch contact3 15

DC 24 V SP-SN

AC, DC 100-250 V S0-S2

Over-Current Relay (OCR)

Control power for terminals (CP/I)

Common line for ind. contact (IU)

Iind. contact (CP/I)




Magnetic hold trigger

19 20

22

23

25

27

28

AL

AG AI

AP

MHT

11.2 Type HAT50

Main Circuit Over-Current Protective Device

Under-VoltageTrip

Motor ChargingClosing Circuits


Draw-out type: The Aux. SW. operate in the connectedand test positions only. When marine classification society’s rulesare applied they operate in the connectedposition only.

Charging motor

Hold relay (anti-pumping)

Latch release coil (closing)

— Manufacturer’s wiring

… User’s wiring

-＜＜- Disconnecting device

Connected 71-72 ON

position 71-73 OFF

74-75 ON

74-76 OFF

Test 61-62 ON

position 61-63 OFF

64-65 ON

64-66 OFF

Terminal Arrangement of Control Circuit OCR Circuit Diagram for 4-pole

AOR-1L-GL

AOR-1L-GM

AOR-1L-GS

AOR-1D-GM

M

HC

LRC

74 64

75 65

76 66

45 43 41 39 37 35 33

46 44 42 40 38 36 34

31 29 27 25 23 21 19

32 30 28 26 24 22 20

15 13 11 9 7 3 1

16 14 12 10 8 2

61 71

62 72

63 73

↑ �Test position SW.Connected position SW.

↑ Test position SW.�↑Connected position SW.

↑(AUX. SW.)

↑(Control Circuit)

(Draw-Out Type)

HAT50

CapacitorTrip

Trip Ind.SW.

ShuntTrip Auxiliary SW. Position SW.



Appendix12

12.1 Ground Fault Protection

1) In case of grounded or resistance ground system in the Y and Y-source transformer.

(1) 3-poles ACB with GFT function in 3 �4W system.

External ground sensing neutral CT connected to the ground element terminals (29, 30).

This means that this ACB will trip the breaker whenever CTs’ residual output current exceeds the setting as in a).

Tripping is independent of phase currents.

The lower the neutral CT ratio, the more sensitive the ground fault protection.


On 4-wire systems, standard includes a fourth CT.

A fourth CT does not sense ground current. Its only function is to sense neutral current.

It is connected to vectorally subtract from the residual current of the phase sensors (see below).

Non-Trip Ia + Ib + Ic + In � 0

Trip Ia + Ib + Ic + In ≠ 0

In case of current unbalance in system, trip also.


The principle is the same (1) 3-poles ACB with GFT function in 3 �4W system.

It is connected to vectorally subtract from the residual current of the phase sensors.

Non-Trip Ia + Ib + Ic � 0

Trip Ia + Ib + Ic ≠ 0

In case of current unbalance in system, trip also.

2) In case of ungrounded system in the Y and �-source transformer.

Since ungrounded systems produce minimal ground current, no damage occurs to the grounded equipment.

These ground currents are also too low for detection by the AOR unit, therefore they serve no ground fault tripping

function if applied on these systems.

If you need ground function, separately install OCGR in switchgear using ZCT.

(1) Connection between neutral current transformer (optional) and OCR.

When using a 3-pole breaker with the GFT function in a 3-phase, 4-wire distribution system, install a neutral

current transformer (optional) to the neutral in the switchboard.

AG Continuously adjustable from ICT X 0.1 ~ 0.4, ICT X (0.1-0.15-0.2-0.25-0.3-0.35-0.4) 7 steps

Pickup current Continuously adjustable from ICT X 0.1 ~ 0.4

Setting tolerance 20%

Time delay (㎳) Automatically set to AS time-delay.

Ia Ib Ic In

� � � �

Ia Ib Ic

� � �


� 3-pole breakers (HAT25~HAT50)� 3-pole breakers (HAT06~HAT20)

(2) Type and rating of neutral current transformer

Select the neutral current transformer, the rating of which is the same as that of the primary current transformer

[ICT], according to the following table.

※ Class of Neutral CT: 1.0 Class.

(3) Connection

Connect the transformer while observing polarity (dotted lines are to be wired by the user).

Breaker

HAT06HAT08HAT10HAT12HAT16

HAT20

HAT25HAT30HAT40HAT50

320/5630/5800/5

1000/51250/51600/52000/5

320/5630/5

1250/51600/52000/5

500/51000/51600/52000/52500/53200/54000/55000/5

Rating of current transformer (A)

If the CTs connect the reverse polarity, the GFT malfunctions.

Power source (or load) Power source (or load)

Load (or power source) Load (or power source)



Appendix12

12.2 Closing and Tripping Operation Cycles

Supply Power Confirm the Diagram Manual Charging

Motor Charging

No

No

No

No No

No

No

NoIndicated “CHARGED”

Indicated “CLOSE”

Closing Operation

Tripping Operation

Indicated “OPEN”

Indicated “OPEN”

Check the Wiring of SHT & UVT

If Necessary,Check the Resistance

Electrical Defect

Contact to HHI

Release “KEY-LOCK”

Mechanical Defect

Refer to Conn. Diagram on Page “52~55“

Confirm the Movementof Interlock System

Supply RatedSource to UVT

Remove theD/O Handle

Confirm the Key-lock & Padlock

Confirm the Position of ACB

Check the Diagram


OK

Repair and Inspection

Date Statement of repair Pay or free Repair shop Name of engineer Signature

※ Please be sure to obtain the appropriate signatures after service. Please keep this table for management, maintenance, and after-sales service.



HH

IS-W

Z-LE

-011-02 ’06,04 Designed by A

DP

AR

K

Head Office 1 Jeonha-dong, Dong-gu, Ulsan, Korea TEL. 82-52-230-8101~8 FAX. 82-52-230-8100

Seoul HYUNDAI B/D, 140-2, Gye-dong, Jongno-gu, Seoul, Korea (Sales & Marketing) TEL. 82-2-746-7589,7510 FAX. 82-2-746-7648

Orlando 3452 Lake Lynda Drive, Suite 110, Orlando, Florida U.S.A. 32817 Tel. 1-407-249-7350 Fax. 1-407-275-4940

London 2nd Floor, The Triangle, 5-17 Hammersmith Grove London, W6 0LG, UKTel. 44-20-8741-0501 Fax. 44-20-8741-5620

Tokyo 8th Fl., Yurakucho Denki Bldg.1-7-1, Yuraku-cho, Chiyoda-gu, Tokyo, Japan 100-0006Tel. 81-3-3212-2076, 3215-7159 Fax. 81-3-3211-2093

Cairo Apartment No. 503, 5th Fl., Bldg. No. 7 Block 2, 9th Division, El-nasr Road, New Maadi, Cairo, EgyptTel. 20-2-520-0148~9 Fax. 20-2-754-7528

Sofia 41, Rojen Blvd. 1271, Sofia BulgariaTel. 359-2-938-1068, 936-0300 Fax. 359-2-936-0742

Yangzhong Lianzhong Avenue, Xinba Scientific and Technologic Zone, Yangzhong City, Jiangsu Province, China.(212-212)Tel. 86-511-842-0666, 0212 Fax. 86-511-842-0668

www.hyundai-elec.com

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